Setting up a mail server using james today was not successful.

I made changes to the configuration file:

1: domainlist.xml:
<domainlist class="org.apache.james.domainlist.jpa.JPADomainList">

2: mailetcontainer.xml:
<!-- When the domain part of the postmaster mailAddress is missing, the default domain is appended.
You can configure it to (for example) <postmaster></postmaster> -->

None of the tests were successful. When sending messages, I always tried to connect to the other party's port 25, but could not connect. After testing for a long time, there was still no effective solution. When sending emails via smtp, it always prompted: org.apache.james
We have to find a way to continue to solve this problem